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ASA R. RE Y o'LDs, OF AUBURN, NEW. YORK, Lena-311m 'No. 63,096, dated March19, 1867.

IMPROVEMENT IN TEMPERING STEEL Arrsrggp uas BEEN WELDED TO IRON FOR currma I T I Elie gtlgchulc mm in it tlgese itttttrs amt inn linking gnu at flge main.

TO ALL WHOM IT MAY CONCERN: p

Be it known thatI, Ass It. REYNOLDS, of Auburn, in the county of Cayuga, and State of New York, have invented certain new and useful Improvements in Tempering Steel after it is Welded to Iron and I do hereby declare the following to be a full, clear, and exact description of thesamc.

Much of the cutlery of the present clay is made of steel that is welded on toiron, as, for instance, shear blades, plane irons, axes, and many otherarticles. My invention relates tea mode of tempering the steel portionsof such cutting-instruments after it is welded on to the iron which forms a permanent part of it. K

In carrying out this invention I use the force and power of a heavy drop-die with slight perpendicular-tall, and an under or anvil-die or block,'between which and the drop-die the article or steel to be tempered is'caught and tightly held, and, in connectionwith this blow, and grasping or'holding,'I use'. the reaction'of the die I and anvil, as more fully described and illustrated in a patent grantcd'to me on the 28th of August, 1866, by which united operations thesteel is compressed and highly tempered.

, 'In 'mypatent above referred-to I explained how articles made entirely of steel were tempered by a reactionary blow. Carrying out still further this general principle of tempering, which may besaid to embrace in one opcration concussion, griping, and continued contactof metal,and the vibrations of the apparatus, resulting from its being placed on an elastic bed of proper material, I have been able to apply the principle tocuttinginstruments not made entirely'of steel, and to avoid all warping or twisting, which isliable to follow liquid tempering, or the cracking or fracture at the welded point or line. Whilst the liquid tempering sets the steel in the expanded condition of'i-ts crystals or fibres, caused heating it and suddenly cooling it, my process, first, by the blow, condenses the steel, and then, by the griping metallic contact and tremblingvibration of the machine, makes it firm, compact, andsusceptible of a tempered cutting'edgenot attained by the-liquid temper ing. The bed or anvil should be of such form as to receive the article and allow it to remain firm (it being, of course, understood that it is to be previously heated)th ereon. The drop-die is let fall upon it, and the reactionary blow it receives accomplishes the tempering, whilst the blowpreviously condenses thc'metal, and in that condensed state it is-held and tempered. In some cases it may be necessary to repeat the blows, the

first-blow to accomplish the welding being the heaviest, whilst the subsequent blows to effect the tempering may be reduced in force, such reduction in force being readily accomplished by raising the drop-die or hammer a less distance from the article' on which it is to fall. The steel being tempered whilst it is in its most compact form,

resulting from the blow of the heavy drop-dic,- and held. so condensed, is susceptible of a cutting edge that cannot be attained by any method ofliquid tempering known or practised in this art.

Having thus fully described my invention, what I claim, is-

Tempering steel'that is Welded on to iron', such as shear b1a'des,plane'irons, chisels, axes', orl1atchets, and

other cutting-tools, by means of a reactionary blows produced by a'drop-die. or hammer, substantially as herein described and represented.

"ASA R. REYNOLDS.

Witnesses HORACE" T. 0001:, JAS. HENDERSON. 

